“Experts recommend everyone consider vitamin D supplements over winter!” The headlines were prompted by new advice on vitamin D from Public Health England (PHE), which says that adults and children over the age of one should have 10 micrograms (mcg) of vitamin D every day. This means that some people may want to consider taking a supplement. The advice is based on recommendations from the government’s Scientific Advisory Committee on Nutrition (SACN) following its review of the evidence on vitamin D and health.